What FOSS needs is saner and simpler type-1 hypervisor storage and compute appliances because the existing solutions are too difficult to deploy and maintain.
It comes "batteries included" with backups/vsan/etc for an insanely reasonable "per host" license cost for support.
It's an old tale, but Azure was sort of late to enter the market here in Europe compared to AWS (GCP was never really an option for a lot of sectors due to Google's inability to sell actual products without Big Brother). Anyway, in the early days AWS had terrible support, it was basically like trying to contact Google as a private customer even if you were a major company. Then came Azure and blew it's way into the enterprise sector, partly because Microsoft was already there but also because Microsoft did what they always do, and actually give you people to talk with. 3 months later we had an AWS representative calling us with a similar experience on sale. Google never adopted anything like it, but today AWS is frankly a great experience for enterprise as well.
The last part Microsoft has is that they bundle things. Teams didn't win because it was the best at what it did when it arrived. It won because nobody in non-tech enterprise would want to pay for a Teams alternative when they were already paying for Teams anyway. In Enterprise you don't pay the listing prices that you or I would if we were to buy office365, windows and some Azure services. You instead buy things through a partner program, and then some of the licenses are different than they otherwise would be.
There is no real alternative to it. All of Europe is looking into moving away from USA tech giants now. You can absolutely replace the Office365 platform with something like Open Deks, but you can't do it without having IT operations staff who can do a lot of the things Microsoft would typically do for you. Similarily you can absolutely run things on Hetzner or OVH, but not as easily as you could if you were doing the Azure vendor lock-in.
If it wasn't for the current geo-political situation, Microsoft would continue it's monopoly on non-tech organisations. For a good while anyway. Because ironically one of their strengths was familiarity. It used to be that when you hired someone, they knew Microsoft Office and they knew Windows, but they've lost that edge. Maybe because this blog entry is spot on as far as the private customer experience goes. Today the most frequently asked question from our new employees as far as IT goes is "can I get a mac?".